public static function MediaLibrary::removeItem in Media Library Form API Element 8

Same name and namespace in other branches

1. 2.x src/Element/MediaLibrary.php \Drupal\media_library_form_element\Element\MediaLibrary::removeItem()

Submit callback for remove buttons.

Parameters

array $form: The form array.

\Drupal\Core\Form\FormStateInterface $form_state: The form state.

Return value

mixed The updated form element.

File

src/Element/MediaLibrary.php, line 476

Class

MediaLibrary

Provides a Media library form element.

Namespace

Drupal\media_library_form_element\Element

Code

public static function removeItem(array &$form, FormStateInterface $form_state) {
  $triggering_element = $form_state
    ->getTriggeringElement();

  // Get the parents required to find the top-level widget element.
  if (count($triggering_element['#array_parents']) < 4) {
    throw new \LogicException('Expected the remove button to be more than four levels deep in the form. Triggering element parents were: ' . implode(',', $triggering_element['#array_parents']));
  }
  $parents = array_slice($triggering_element['#array_parents'], 0, -4);
  $element = NestedArray::getValue($form, $parents);
  $user_input_parents = array_slice($triggering_element['#parents'], 0, -4);
  $delta = array_slice($triggering_element['#array_parents'], -3, 1)[0];
  if (isset($element['selection'][$delta])) {
    unset($element['selection'][$delta]);
    $items = array_filter($element['selection'], static function ($k) {
      return is_numeric($k);
    }, ARRAY_FILTER_USE_KEY);
    $remaining_items = [];
    foreach ($items as $item) {

      /** @var \Drupal\media\Entity\Media $media_item */
      $media_item = $item['preview']['rendered_entity']['#media'];
      if ($media_item instanceof Media) {
        $remaining_items[] = $media_item
          ->id();
      }
    }
    $selection = implode(',', $remaining_items);

    // Remove our value.
    $element['media_library_selection']['#value'] = $selection;
    $element['media_library_selection']['#default_value'] = $selection;
    $element['#value'] = $selection;
    $element['#default_value'] = $selection;

    // Clear the formstate values.
    $form_state
      ->setValueForElement($element, $selection);

    // Clear formstate user input.
    $user_input = $form_state
      ->getUserInput();
    NestedArray::setValue($user_input, $user_input_parents, $selection);
    $form_state
      ->setUserInput($user_input);
    $form_state
      ->setValue($user_input_parents, $selection);
  }

  // Refresh the form element.
  $form_state
    ->setRebuild();
}